package com.sjt.blog.web.admin;

import com.sjt.blog.po.Type;
import com.sjt.blog.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TypesController {

    @Autowired
    private TypeService typeService;

    @GetMapping("/types")
    public String list(@PageableDefault(size = 10, sort = ("id"), direction = Sort.Direction.DESC) Pageable pageable, Model model) {
        model.addAttribute("page", typeService.listType(pageable));
        return "admin/types";
    }

    @GetMapping("/types/input")
    public String input(Model model){
        model.addAttribute("type", new Type());
        return "admin/types-input";
    }

    @GetMapping("types/{id}/input")
    public String editInput(@PathVariable("id") Long id, Model model){
        model.addAttribute("type", typeService.getType(id));
        return "admin/types-input";
    }

    @PostMapping("/types")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes attributes){
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null){
            result.rejectValue("name", "nameError", "该分类已存在！");
        }
        if (result.hasErrors()){
            return "admin/types-input";
        }

        Type t;
        if (type.getId() == null){
            t = typeService.saveType(type);
        }else {
            t = typeService.updateType(type.getId(),type);
        }

        if (t == null){
            // 保存失败
            attributes.addFlashAttribute("message", "操作失败！");
        }else {
            // 保存成功，重定向会列表
            attributes.addFlashAttribute("message", "操作成功！");
        }

        return "redirect:/admin/types";
    }

    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable("id") Long id, RedirectAttributes attributes){
        typeService.deleteType(id);
        attributes.addFlashAttribute("message", "删除成功！");
        return "redirect:/admin/types";
    }
}
